Automatically-threading shuttle fob looms



Feb; 12 1924. V I 1,483,492

- v 5.; s. STIMPSON AUTOMATICALLY THREADING SHUTTLE FOR LOOMS Filed Dec. 2. 1922 4 Sheets-Sheet. 1

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- NVVE/VTOR. 6 0221 045 7 14,

ATTORNEY Feb. 12 1924. 1,483,492

E. S. STIMPSQN AUTOMATICALLY THREADING SHUTTLE FOR Looms Filed Dec. 2, 1922 .4 Sheets-sheaf. 2

' a/ EN TOR? ATTQF/QEY Feb. 12 1924. 1,483,492

E. S. STIMPSON AUTOMATICALLY THREADING SHUTTLE FOR LOOMS Filed Dec. 2 1922 4 Sheets-Sheet 4 INVENTOR.

ATTORNEY his fit)

Patented llfi lltllil lli l) El'llltlllilttiltlltil, tlll ldEUPlElllttlllEl, ll'lill ro'narton, (Jill? ll-lEUlEElDAlLlE, llil'ullfilldllfllt-l P'lE ti enact-runners, accretion nnarnia conapplication filed ltleceinlierlt, teat.

I0 uZZ- whom it may concern ll-e it known that l, EDWARD S. Srnurson, a citizen of the United @tates, residing in l-ltuqedale in the county 0t l Vorcester and State of lllassachusetts, have invented an improvement in Automatically-Threading tiihnttles tor Looms, of which the tolloiving description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to automatically threznling shuttles used in looms wherein the Weft or filling thread is automatically replenished troni time to time.

l'n looms of the replenishing type it is now the common practice to support the full Welt or filling carriers in a magazine or hopper at the replenishing side oi the 100111 with the ends of the weft or filling threads leading from the full carriers and secured to a holder so that, when replenishment of the filling has been affected and the shuttle makes its first traverse across the looni, the thread is. drawn oil the carrier and prelin1i narily or partially threaded through the shuttle, and on the return ot the shuttle to the replenishing side at the loom, the threadlllg ot the shuttle is completed through the delivery eye. During the subsequent ving ope *ation the thread carried in the scuttle is liable to loop or overthrow when the sliluttle is suddenly arrested in the box at the replenishing side of the 10cm with the result that the thread will sometimes be looped about or be caught by the threading device or other part and be broken when the shuttle again picked, or the shuttle may tail to partially thread when the shuttle is picked troin the replenishing side of the looin and be broken on the next flight of the shuttle back to the replenishing side.

Efforts have been made to prevent these olijectionaliile occurrences by providing auto matically threading shuttles with threading devices which While permitting the shuttle to be partially threadedon its first flight at tor replenishment and completely threaded on its next flight back to the replenishing side of thread Within the threading device and prercnt unthreading or partial unthreading in the looni, have sought to retain the Serial Ittl'o, coat-ac.

case of overthrow or looping of the thread by various forms of horns, or overhangs, or guards which prevent free exit of the thread from the threading device once the shuttle has been threaded. lln some cases the obstructing horns or overhangs have been associated With scroll eyes located in the thread passage to facilitate shuttle threading and as an additional security against subsequent unthrea-ding.

The present invention ditlers from all. oi? these and is based on the discovery that it the threading device be constructed to permit ready unthrea'ding on the occurrence of an overthrow or looping of the thread, as Well as to cause the shuttle to be readily rethreaded as it is subsequently picked, many oi the evils and objectionable troubles here before encountered will be overcome and breakageot the thread avoided.

Another source ct thread breakage, known as a hopper inisthread, occurs during the transfer oi 'a fresh supply of Welt or filling to the shuttle when replenishment is called. Such hopper misthreads or breakages are due in some cases to the thread between. the carrier or bobbin and end holder striking an overhang or guard of the threading dcvice as the fresh carrier or bobbin is transferred to the shuttle chamber.

An important feature of the present invention, therefore, consists of a shuttle having; a thread passage extending longitudinally ot the shuttle and. a thread casting and guiding device which acts upon the thread when it OVBItlIIOWS or loops at the replenishing side of the looro, to cast the thread and permit the shuttle to become our tl'ireaded or partially so. The longitudinally extending thread passage is so con structcd that the weft or filling thread may readily pass into the passage when the shut tle picked from the replenishing side of the looin and as readily pass out of the thread passage on the occurrence of an overthrow or loop when the shu tie is an rested in the shuttle box.

To guide the Weft or filling thread into the side delivery eye as the shuttle is picked towards the replenishing side of the loom. the present invention provides a novel construction of thread director above the side tit] lltl

eye, the front end portion of which is turned laterally to some extent but does not obstruct the entrance or exit of the thread to the longitudinally extending thread passage, and is curved and rounded gradually to form a tapering laterally extending end without a hook or other obstruction in order to shed any loop of thread that may be caught when the thread overthrows or loops as the shutter is stopped at the end of its traverse. Should the loop be caught on the thread director, it will be cast therefrom by the pull of the thread on the next flight of the shuttle.

The above and other novel features of the invention and new combination of parts will be made clear by the following description and accompanying drawings of one good practical form thereof.

In the drawings:

Fig. 1 is a plan view at the replenishing side of the loom, showing at the right the formation of a 100 or overthrow of the thread as the shuttle is suddenly arrested in the shuttle box;

Fig. 2 is an enlarged perspective view of the threading end of a shuttle provided with the present invention showing the course of the thread during the normal weaving operation;

Fig. 3 is a view similar to that of Fig. 2 showing the loo 1 or overthrow of thread being formed an the thread casting and guiding device in the act of casting as the shuttle is arrested in the shuttle-box;

Fig. 4 is a similar view showing the thread as having been fully cast by the thread casting and guiding device;

Fig. 5 is a similar view showing the shuttle as having been picked following the occurrence of the loop or overthrow and the shuttle again fully threaded;

Fig. 6 is a view similar to that of Fig.

3 showing the formation of a twisted loop or overthrow of thread that is liable to occur when the shuttle is arrested at the end of its traverse; v

Fig. 7 is a similar view of the shuttle as it moves towards the opposite shuttlebox after the formation of an overthrow or loop and showing the thread looped once about the thread casting and guiding device and also about the thread director;

Fig. 8 is a view similar to that of Fig. 7 showing the thread loop on the thread casting and guiding device and that on the thread director as being cast therefrom by the pull of the thread;

Fig. 9 is a view similar to that of Fig. 8 showing the loop cast from the thread casting and guiding device and just leaving the thread director as the shuttle continues its transverse;

Fig. 10 shows the shuttle of Fig. 9 and the fully threaded condition thereof when the shuttle reaches the end of its traverse;

Fig. 11 is an enlarged end perspective view of a shuttle provided with the present invention;

Fig. 12 is a longitudinal sectional view of a threading device containing the present invention;

Fig. 13 shows the shuttle going in the direction of the arrow and a condition that sometimes occurs when the shuttle has become partially unthreaded; Fig. 14 shows a modified form of the thread casting and guiding device, and a loop of thread as having been caught by the thread director; and

Fig. 15 is a view similar to that of Fig. 14: showing the shuttle on its way to the op posite box and the loop of thread on the thread director being cast therefrom by the pull of the thread.

The advantages of the present invention are best manifested in connection with a threading block and the invention will be described as associated therewith, although it may be advantageously employed in a shuttle where the unobstructed thread passage is otherwise provided.

The loom, in connection with which shuttles containing the present invention are employed, is of the filling replenishing ty wherein the depleted filling carrier or be bin in the shuttle is replaced from time to time by a filling carrier or bobbin contaiir ing a working supply of fillin or weft. Hereinafter the weft or filling t read will for brevity be known as the thread.

Referring more particularly to Fig. 1, the loom frame 1 may be of any usual construction, and has secured thereto the magazine or hopper 2 in which are supported the filling carriers or bobbins 3 containing a working supply of filling. As usual in this class of looms, the ends of the thread leading from the filling carriers or bobbins are secured to a holder, so that on the first pick of the shuttle following replenishment, the shuttle will be preliminarily or partially threaded, and on the return of the shuttle to the replenishing side of the loom the shuttle will be completely threaded.

The lay 4 has the usual shuttlc-box 5 at the replenishing side of the loom, Fig. 1, and when the shuttle is suddenly brought to rest in the box 5 the thread is liable to loop or overthrow, as indicated in Fig. 1.

The shuttle 6 is provided with the bobbin chamber 7, and has the usual bobbin holding jaws for holding the bobbin or filling carrier in the shuttle, and as usual in this general type of shuttle, it is provided with an opening in the bottom through which the spent or depleted filling carrier may be ejected when replenishment of filling is effected.

The front end of the shuttle 6 is provided with the side delivery eye 8 and the wood of all ins

the shuttle is cut away at 9 for the reception or the threading bloclr 10 which maybe se cured in place by means oi the usual trans verse bolt which passes through an opening 11, Fig. 12, of the threading block.

The threading block 10 has an unobstructed longitudinally extending thread passage 12 which permits the tree entrance or exit or the thread. The threading block 10, as shown, comprises a base portion having an upwardly extending side wall 13 at one side oi the thread passage and an opposite up wardly extending side wall it, the two walls forming between them an open thread pas sage to and from which the thread may readily pass.

The wall 13 of the threading block has its upper portion provided with. a thread director 15 the end 16 oil which extends front wardly or towards the end of the shuttle away "from the bobbin chamber and is turned slightly in a transverse direction without, however, obstructing the thread passage. The terminal or end portion 16 ot the thread director has its surfaces and side portions 17, 18 and 19 converging gradually in a curved direction towards the end '16 forming a tapering loop casting terminal so that should a loop o'lE thread be caught about the thread director on the occurrence of a loop or overthrow of the thread, the tension or pull of the thread on the following piclr of the shuttle will cause the loop to move towards and finally oil the end oi the thread director.

lChe outer side portion 20 of the thread director is carried close to but not in contact with the wood of the shuttle at 21 to form a thread directing passage leading to the side delivery eye 8.

Within the thread passage 12 is the thread casting and guiding device having an up wardly extending edge portion 23 which is curved trontwardly and laterally at 5% and downwardly at 25 to form an upwardly, frontwardly and laterally curved thread casting edge. The thread casting andguiding device 22, as shown in Fig. 12, has a widened base portion 26 which may be conveniently secured to the threading block by a slot 27 into which the widened portion of the thread casting and guiding device entends. To insure positive connection of the thread casting and guiding device to the threading hloclr, it may be secured to the block and held in the slot 27 by the usual transverse bolt by which the threading block itself is secured to the shuttle. The front uprising edge portion oi? the thread casting and guiding device is curved baclrwardly at 28 in converging relation. with the edge pertions 24 and 25, and two edge portions E28 and 25 gradually merging into the terminal loop casting end portion. 29 of the thread casting and guiding device. lhe constructilt tion is such that on the occurrence cl a loop or overthrow of the thread a, Fig. 3, as the shuttle is brought to rest in the shuttle bolt, the thread a will be guided by the upwardly, trontwardly and laterally extending thread casting edge to cause the thread to be entirely cast from control of the thread casting and guiding device, as indicated in l ig. 41..

Between the thread casting terminals 16 of the thread director and 29 oi. the thread casting and guiding device is the bridge 5O lfiig. 12, the upper edge portion 31 at which serves as a rest :tor the thread on its way from the bobbin chamber to the side delivery eye. The bridge 31 has the upwardly entending portions 32. one at each side out the bridge portion 31. about one oil which the thread a may pass on its way to the side delivery eye.

lfluring normal weaving operatiom the thread a leading from the filling carrier or bobbin in the shuttle passes longitudinally through the thread casting and guiding device 22 over the bridge surlace 31 and then laterally to the side delivery eye 8. Eihould a loop or overthrow of the thread occur when the shuttle is suddenly arrested in the replenishing born as indicated in llig. 3, the b ight o'l thread formed by the loop over the thread casting edge of the thread casting and guiding device will travel along the thread casting edge and finally be cast entirely From the control of the thread casting and guiding device, as indi 'ated in lllig. a. This condition may happen at times without the loop catching around. any part of the thread ing device and the thread a may still be retained by the side delivery eye. lin this event. when the shuttle is picked. from the replenishing box, the pull. of the thread alter the shuttle has passed into the shed will cause the tl'iread to again more through the unobstructed thread passage and into the thread casting and guiding device in the position indicated. in lTig. .5 which shows the shuttle again lully threaded.

lit may happen at times during weaving. especially with lrinlry thread. that instead of the thread being cast from the thread casting and guiding device, as described in connection with Figs. 3 and l, the thread may become looped about the thread casting and guiding device or the thread director. or about both, as indicated in Figs. 6, 7 and l l hen this occurs and the shuttle is picked, following such interloopinp' oithe thread about the thread casting and guiding device or the thread director or hotln the pull of the thread as the shuttle passes tlni-ough the shed will cause the loop or loops oi thread to be cast from the thread casting and guiding device and from the thread director. hi

7 the loop h of the thread s n' torrned about the thread casting and guidn till lllltl llllti llll lti

llltl device and the loop 0 as having been caught by the thread director. When the shuttle starts on its traverse through the shed, as indicated by the arrows in Figs. 7 and 8, the pull of the thread will cause the loops Z) and c to be cast from the tapering end portions of the thread casting and guiding device and the thread director and finally to take the position indicated in Fig. 9 where both loops of the thread have been cast from the parts engaged by them. As the shuttle continues its travel to the non-replenishing side of the loom, the pull of the thread after having cast the loops will cause the thread to pass again into the control of the thread casting and guiding device and the shuttle be fully threaded, as indicated in Fig. 10.

If, for any reason, the thread should not be retained in the side delivery eye, and should escape over the top of the thread director when the shuttle finally comes to rest in the non-replenishing box, the inwardly curved portion 28 of the thread cast ing and guiding device will still continue its control of the thread, and as the shuttle is picked to the replenishing side of the loom, the thread a leading from the filling carrier or bobbin in the shuttle through the thread casting and guiding device, will lead hackwardly around the edge 28 of the thread casting and guiding device to the cloth selvage, so that breakage of the thread will not occur, as indicated in Fig. 13. Under the conditions last described, the shuttle will come to rest in the replenishing box with the thread leading as indicated in Fig. 13, and when the shuttle is picked from the replenishing box the thread will lead from the cloth selvage through the thread passage and be caught beneath the end of the thread director, with the result that when the shuttle is again picked from the non-replenishing side of the loom, the shuttle will become completely threaded and the thread will lead from the side delivery eye.

In Figs. 14; and 15 a slightly modified form of the thread casting and guiding device is shown, wherein the upwardly, laterally and frontwardly extending thread casting edge is substantially the same as that in the preferred form of the invention already described, but the terminal end portion 33 of the thread casting and guiding device is not carried beyond the main body of the device but turns inwardly. lVith the modified form of the thread casting and guiding device there is less likelihood of the thread becoming looped about the thread casting and guiding device, in the manner indicated in Figs. 7 and 8, but it may catch upon the thread director, as indicated in Fig. 14;, so that when the shuttle is picked from the replenishing box, the pull of the thread will cause the loop to be cast from the end of the thread director and the shuttle to become fully threaded again. Fig. 15 shows the tension of the thread having pulled the loop around the thread director and by the pull of the thread moved the loop in the direction of the arrow, Fig. 15. over the thread casting and of the thread director.

From the construction described it will be noted that the present invention provides exit of the thread and a thread casting and guiding device in the thread passage adjacent the bobbin chamber for casting the thread from the control of said device when the thread loops or overthrows as the shuttle is brought to rest in the replenishing box.

the walls of the threading block or otherwise, permits the thread to pass upwardly when, on the occurrence of a loop or overthrow, the thread is cast by the thread casting device, so that the shuttle may be partially or wholly unthreadedat such time and be again threaded on the following picks of the shuttle.

The thread casting and guiding device. which is located in the unobstructed thrczul passage of the threading block, is shown in the present instance of the invention as of general scroll form, having its thread casting edge portion extending upwardly, front- Wardly and laterally from the bobbin chamher, and its terminal or loop casting portion gradually taperin'g to an end beyond the body of the scroll, and while the scroll formation of the thread casting and guidin; device presents a simple and effective means for accomplishing the ends hereinbc'lore described, such thread casting and guiding device may take other forms, as applicant believes himself to be the first in the art to provide an automatically threading shuttle with a thread passage for the free entrance and exit of the thread and a thread casting device for casting the thread from the control of said device or partially unthreading the shuttle on the formation of a loop or overthrow of the thread when the shuttle is suddenly arrested in the replenishing box, the said construction as shown and described having the further capacity of insuring rcthreading of the shuttle when it is subse quently picked.

When replenishment of the shuttle cl- :tected, the incoming thread carrier or bobbin will cause the thread between it and the thread holder to pass freely into the unobstructed thread passage, because at such lift] lili'i lltl it'll hill bill

narrates time the shuttle is directly beneath the in coming thread carrier or bobbin, and consequently the thread between the incoming thread carrier or bobbin and the thread holder encounters no obstruction to its free entrance into the thread passage. The re sult is that hopper misthreads are entirely avoided.

What is claimed is:

1. An automatically tln'eading loom shuttle having a thread passage extending longitudinally thereof, a side delivery eye con'n'nunieating with the thread passage, and a thread casting and guiding device in the thread passage constructed and arranged to cast the thread and partially or wholly unthread the shuttle on the occurrence of an overthrow as the shuttle is arrested at the end of its flight.

2. i ln automatically threading loom shuttle having a thread passage extending longitudinally thereof, a side delivery eye, and a. thread casting scroll having a portion extending upwardly, laterally, and frontwardly from a point adjacent the bobbin chamber for casting the thread "from the scroll and thread passage on the occurrence ot an overthrow of the thread.

3. An automatically threading,- looin shuttle having the wood of the shuttle cut away to term a threading block receiving chamber and side delivery eye, in co1nbination with a threading block adapted to be secured in said chamber and having a thread passage extending longitudinally thereof, and a thread casting and guiding device in the thread passage of the threading block tor casting the thread tlirom the control of said device on the occurrence of a loop or overthrow oi the thread as the shuttle is arrested and returning the thread to the control of said device as the shuttle is picked.

4t. llin automatically threading shuttle provided with a bobbin chamber and having the wood of the shuttle cut away at the threading end of the shuttle to form a block chamber, in combination with a threading block having a thread passage extending longitudinally thereof and open at its top for the entrance and exit oi the thread, and a thread casting and guiding device in the thread passage which acts upon the thread on the occurrence of an overthrow to partially or wholly unthread the shuttle and to automatically rethread the shuttle as the shuttle again picked.

5. Jtn automatically threading loom shuttle having the material of the shuttle cut away to form a threading block receiving chamber and a side delivery eye, in combination with a threading block adapted to be secured in said chamber and having a longitudinally extending thread passage, and a thread casting and guiding device in loom.

the thread passage having thread wasting portion. which extends upwardly, laterally, and trontwardly trom a point adjacent the bobbin chamber for casting the thread from said. device and partially unthreading the shuttle on the occurrence ot an overthrow.

6, An automatically threading loom shuttle having a thread passage extending longitudinally thereof and opening upwardly to permit the thread to be bodily passed to and from the thread passage, a side delivery eye, means normally acting to retain the thread in the thread passage during the flight of the shuttle, and a thread casting surtlace extending from a point adjacent the bobbin chamber in an upward, lateral, and trontward direction tor engaging the thread on the occurrence of an overthrow as the shuttle is arrested at the end oil. its flight and casting the thread upwardly through the thread passage to partially unthread the shuttle.

7. [in automatically threading looni shuttle having a thread passage extending longitudinally of the shuttle with an open top for the bodily entrance and exit of the thread, a side delivery eye, and a thread casting and guiding device in the thread passage for throwing the thread bodily from said device on the occurrence of an overthrow and having a frontwardly extending loop casting end, the walls of? which converge in the thread PHSSzt-QJO for casting a loop oi thread therefrom by the pull of the thread as the shuttle is picked.

8. An automatically threading loom shuttle having a thread passage extending longitudinally of the shuttle and open at its top for the entrance and exit oi. the thread, a side delivery eye, a thread casting and guiding device in the thread passage constructed and arranged to cast the thread on the occurrence of an overthrow as the shuttle is suddenly arrested and having a troutwardly extending loop casting end, and a thread director having a gradually tapering loop casting end extending at an angle to the axis of the thread casting and guiding device that a loop of thread caught by either the thread casting and guiding device or thread director may be cast therefrom by the pull of the thread as the shuttle is picked.

9. An automatically threading loom shuttle having a longitudinally extending thread passage, a side delivery eye, a thread casting guide within the thread passage having an edge portion which extends up wardly from a point adiacent the bobbin chamber, then trontwardly and laterally, and an edge portion more remote "from the bobbin chamber which extends upwardly and rearwardly towards the bobbin chamber within the thread passage to guide the thread trons. the carrier or bobbin. in the ltlth llltl liltl shuttle to the cloth selvage when the shuttle is piclred towards the replenishing side of the loom and fails to be retained in the side delivery eye.

10. An auton'iatically threading loom shuttle having a thread passage extending longitudinally thereof, a side delivery eye communicating with the thread passage, a thread casting and guiding device in the thread passage constructed and arranged to cast the thread and. permit the shuttle to partially or wholly unthread on the occurrenee of an overthrow as the shuttle is arrested at the end or" its flight, and a bridge between the thread casting and guiding device and the side delivery eye.

11. An automatically threading loom shuttle having a longitudinally extending thread passage opening upwardly to permit the thread to be bodily thrown upwardly out of the thread passage, a thread casting and guiding scroll within the thread passage having a thread casting edge extending upwardly at a point adjacent the bobbin chamber, then irontwardly and laterally, and having an edge remote from the bobbin chamber which extends upwardly and backwardly, the two edge portions of the thread casting and guiding device gradually converging frontwardly of the scroll and forming a loop casting portion for casting a loop by the pull of the thread as the shuttle is picked.

12. An automatically threading loom shuttle having a thread passage opening upwardly and extending longitudinally of the shuttle that a loop of thread may be thrown upwardly out of the thread passage, a side delivery eye, a thread director for directing the thread to the side delivery eye, and a thread casting and guiding scroll in the thread passage provided with a thread casting edge which starts at a point adjacent the shuttle chamber and extends upwardly, trontwardly, and laterally to cause the thread to be thrown "from the'device on the occurrence of a loop or overthrow, the terminal or end of the scroll being extended frontwardly beyond the body of the scroll and gradually tapering from the upwardly extending portion of the scroll that a loop caught by the scroll may be cast off the end of the scroll by the tension of the thread as the shuttle is picked.

13. An automatically threading loom shuttle having a threading block with a top thread passage, a side delivery eye, a thread casting and guiding scroll secured to the threading block and extending upwardly from the bottom of the thread passage and having an upwardly, frontwardly, and laterally inclined rear edge portion for easting the thread on the formation of a loop or overthrow as the shuttle comes to rest, and an upwardly extending front edge portion, said edge portions being gradually converged into a loop casting end of the scroll, and a thread director tor directing thethread to the side delivery eye.

14. An automatically threading loom shuttle having a longitudinally extending thread passage which opens upwardly to permit the thread to he bodily thrown out of the thread passage, a side delivery eye, means in the thread passage normally acting to retain the thread in the thread passage during the flight of the shuttle, and a thread casting surface constructed and arranged in the thread passage to cast the thread rom said means and upwardly through the open thread passage to partially unthread the shuttle on the occurrence of an overthrow of the thread as the shuttle is arrested at the end of its flight.

15. An automatically threading loom shuttle having a longitudinally extending thread passage which opens upwardly to permit the thread to be bodily thrown out of the thread passage, a side delivery eye, means in the thread passage normally acting to retain the thread in the thread passage during the flight of the shuttle. a thread casting surface constructed and arranged in the thread passage to cast the thread from said means and upwardly through the open thread passage to partially unthread the shuttle on the occurrence of an overthrow of the thread as the shuttle is arrested at the end of its flight, and a thread director having a tapered loop casting portion that a loop formed upon the thread director may be cast therefrom by the pull of the thread as the shuttle is picked.

In testimony whereof. I have signed my name to this specification.

EDWARD S. STIMPSON 

